Quiz 14- Chemistry-General Science: General Knowledge Question & Answers

131 Q) "Which one of the following is correct? Setting of plaster of Paris is "

(a)dehydration

(b)oxidation with atmospheric oxygen

(c)hydration leading to another hydrate

(d)combination with atmospheric carbon dioxide

Show Answer

D

132 Q) At the very low temperature, ice forms

(a)tetrahedral crystal

(b)cubic crystal

(c)hexagonal crystal

(d)None of the above

Show Answer

B

133 Q) Food wrapped in newspaper is likely to get contaminated with

(a) aluminium

(b) lead

(c) iron

(d) magnesium

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B

134 Q) "Consider the following statements 

I.Dry ice is the solid form of CO2.

 II.Dry ice is used primarily as a cooling agent. 

III.Water ice is colder than dry ice. 

Which of the statements given above is/are correct?"

(a) Only I

(b) Only II

(c) I and II

(d) I, II and III

Show Answer

C

135 Q) " Assertion (A) Nitric acid is used in the production of fertilizers. 

Reason (R) Sulphuric acid is used in the production of explosive."

(a)Both A and R are true and R is the correct explanation of A

(b)Both A and R are true but R is not the correct explanation of A

(c)A is true but R is false

(d)A is false but R is true

Show Answer

B

136 Q) "With reference to the usefulness of the by-products of sugar industry, which of the following statements is/are correct? 

1. Bagasse can be used as biomass fuel for the generation of energy. 

2.Molasses can be used as one of the feedstocks for the production of synthetic chemical fertilizers. 

]3. Molasses can be used for the production of ethanol. 

Select the correct answer using the codes given below."

(a) Only 1

(b) 2 and 3

(c) 1 and 3

(d) 1, 2 and 3

Show Answer

C

137 Q) The bonding between the nitrogenous bases of one strand with another strand of DNA is done by

(a)covalent bond

(b)van der Waals' interaction

(c)hydrogen bond

(d) ionic bond

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C

138 Q) Which one among the following when dissolved in water give hissing sound?

(a) Limestone

(b)Sodalime

(c) Slaked lime

(d)Quick lime

Show Answer

D

139 Q) Which one among the following would expand the most on being heated?

(a) Water

(b) Air

(c) Alcohol

(d) Glass

Show Answer

B

140 Q) If a limestone piece is dipped in water, bubbles evolve. The bubbling is due to

(a) hydrogen

(b)oxygen

(c) water vapour

(d)carbon dioxide

Show Answer

D